A surname.

plural of Chelsea smile

A shortening of the prefix cyno- when used before vowels.

(organic chemistry) The steroid alkaloid (1S,3aS,3bS,5aR,6S,7S,9aR,9bS,11aS)-1-[(1S)-1-(Dimethylamino)ethyl]-9a,11a-dimethylhexadecahydro-1H-cyclopenta[a]phenanthrene-6,7-diol